The Tor Browser: memory/mozjemalloc/linkedlist.h@8bccb770b82d

     1 /* -*- Mode: C; tab-width: 8; c-basic-offset: 8; indent-tabs-mode: t -*- */

     2 /* vim:set softtabstop=8 shiftwidth=8 noet: */

     3 /*-

     4  * Copyright (C) the Mozilla Foundation.

     5  * All rights reserved.

     6  *

     7  * Redistribution and use in source and binary forms, with or without

     8  * modification, are permitted provided that the following conditions

     9  * are met:

    10  * 1. Redistributions of source code must retain the above copyright

    11  *    notice(s), this list of conditions and the following disclaimer as

    12  *    the first lines of this file unmodified other than the possible

    13  *    addition of one or more copyright notices.

    14  * 2. Redistributions in binary form must reproduce the above copyright

    15  *    notice(s), this list of conditions and the following disclaimer in

    16  *    the documentation and/or other materials provided with the

    17  *    distribution.

    18  *

    19  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER(S) ``AS IS'' AND ANY

    20  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

    21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR

    22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) BE

    23  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR

    24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF

    25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR

    26  * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,

    27  * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE

    28  * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,

    29  * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

    30  *

    31  *******************************************************************************/

    33 #ifndef linkedlist_h__

    34 #define linkedlist_h__

    36 #include <stddef.h>

    38 typedef struct LinkedList_s LinkedList;

    40 struct LinkedList_s {

    41 	LinkedList *next;

    42 	LinkedList *prev;

    43 };

    45 /* Convert from LinkedList* to foo*. */

    46 #define LinkedList_Get(e, type, prop) \

    47   (type*)((char*)(e) - offsetof(type, prop))

    49 /* Insert |e| at the beginning of |l|.  */

    50 void LinkedList_InsertHead(LinkedList *l, LinkedList *e)

    51 {

    52 	e->next = l;

    53 	e->prev = l->prev;

    54 	e->next->prev = e;

    55 	e->prev->next = e;

    56 }

    58 void LinkedList_Remove(LinkedList *e)

    59 {

    60 	e->prev->next = e->next;

    61 	e->next->prev = e->prev;

    62 	e->next = e;

    63 	e->prev = e;

    64 }

    66 bool LinkedList_IsEmpty(LinkedList *e)

    67 {

    68 	return e->next == e;

    69 }

    71 void LinkedList_Init(LinkedList *e)

    72 {

    73 	e->next = e;

    74 	e->prev = e;

    75 }

    77 #endif

The Tor Browser / file revision